From the Wikipedia page 
The Tyva Republic (Russian: Респу́блика Тыва́, tr. Respublika Tyva; IPA: [rʲɪˈspublʲɪkə tɨˈva]; Tuvan: Тыва Республика, Tyva Respublika, [tʰɯˈʋa resˈpʰuplika]), Tyva or Tuva (Tuvan: Тыва; Russian: Тува́) is a federal subject of Russia (a republic, also defined in the Constitution of the Russian Federation as a state). It lies in the geographical center of Asia, in southern Siberia. The republic borders the Altai Republic, the Republic of Khakassia, Krasnoyarsk Krai, Irkutsk Oblast, and the Republic of Buryatia in Russia and Mongolia to the south. Its capital is the city of Kyzyl.
From 1921 until 1944, Tuva constituted a sovereign, independent nation, under the name of Tannu Tuva, officially, the Tuvan People's Republic, or the People's Republic of Tannu Tuva. The independence of Tannu Tuva, however, was recognized only by its neighbors: the Soviet Union and Mongolia.